Schematic view of the 3D edge-sharing network of VO_6 octahedra extracted from the experimentally determined low-temperature tetragonal phase structure of MgV₂O₄.

From the article:

$A$-Type Antiferro-Orbital Ordering with $I{4}_1/a$ Symmetry and Geometrical Frustration in the Spinel Vanadate ${\mathrm{MgV}}_2{\mathbf{O}}_4$
S. Niitaka, H. Ohsumi, K. Sugimoto, S. Lee, Y. Oshima, K. Kato, D. Hashizume, T. Arima, M. Takata, and H. Takagi
Phys. Rev. Lett. 111, 267201 (2013)

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